KEBA DO272/A Digital Output Module Detailed Product Description I. Product Overview
KEBA DO272/A Digital Output Module Detailed Product Description I. Product Overview
The KEBA DO272/A is a 14-channel digital output module from the Austrian KEBA Kemro K2-200 series. It is specifically designed for industrial automation control systems, used to convert controller instructions into on-site switch signals, and to drive actuators such as solenoid valves, relays, contactors, and indicator lights. The module is installed in a standard rack and powered by the K-bus bus, featuring optical isolation, 2A drive per channel, short-circuit/overload protection, hot-swappable components, and other industrial-grade characteristics. It is widely used in equipment such as injection molding machines, die-casting machines, machine tools, and automated production lines, and is one of the cost-effective output modules in the KEBA control system.
II. Core Functions
14 Independent Digital Outputs
Integrated 14 channels, each channel can be independently switched and controlled, outputting 24V DC signals, suitable for NPN/PNP type loads, capable of directly driving solenoid valves, hydraulic valves, relay coils, indicator lights, buzzers, small contactors, etc. as actuating elements.
Electrical Isolation Anti-interference
Optical isolation between the output side and the system side, blocking ground loop interference, effectively suppressing electromagnetic noise generated by frequency converters and motors, avoiding misoperations, suitable for strong interference workshop environments, ensuring stable control.
Single-channel 2A High Drive Capacity
Each channel has a maximum output current of 2A, meeting the needs of most solenoid valves and small motor control; with permanent short-circuit protection, short-circuit occurs and the module is automatically shut down and faults are reported, protecting the module and the circuit.
Channel Status LED Indication
Each channel is equipped with an independent orange LED, which lights up when outputting ON, goes off when OFF; when there is a fault (short circuit / overload), it flashes quickly, providing intuitive and efficient on-site debugging and fault location.
Bus Plug-and-Play and Hot Swap
Compatible with KEBA's dedicated K-bus backplane bus, plug-and-play, automatic identification, no complex configuration required; supports hot swapping, without downtime to replace modules, reducing maintenance downtime.
Multiple Electrical Protection
Integrated overvoltage, reverse polarity, overcurrent, short circuit, overheat protection, capable of withstanding incorrect wiring and voltage fluctuations in the field, less prone to damage, high reliability.
Capable of Handling Inductive Loads
Built-in fast disconnection circuit for inductive loads, capable of quickly releasing the reverse electromotive force of solenoid valves and relay coils, shortening the disconnection time, reducing contact burnout, improving response and lifespan.
III. Technical Specifications
Manufacturer: KEBA AG (Austria)
Model: DO272/A
Series: Kemro K2-200
Number of Channels: 14 Independent Digital Outputs
Output Type: 24V DC Transistor Output (Source/Drain Compatible)
Rated Output Voltage: 24V DC (19.2–30V DC wide range)
Single-channel Maximum Current: 2A (50% simultaneous rate)
Electrical Isolation: System Side ↔ Output Side Optical Isolation
Protection Functions: Short Circuit, Overcurrent, Overvoltage, Reverse Polarity, Overheat
Response Time: Typical ≤ 1ms
Status Indication: Each channel has an orange LED (ON/OFF/Fault Flashing)
Power Supply: K-bus Bus Power Supply (24V DC + 5V DC)
Power Consumption: 24V DC ≤ 2.1W; 5V DC ≤ 0.4W
Operating Temperature: 0℃ ~ +60℃
Storage Temperature: -40℃ ~ +70℃
Humidity: 5%–95% (No Condensation)
Protection Grade: IP20 (Prevents Finger Contact, Dust Resistance, Wide Temperature Range), MTBF ≥ 500,000 hours.
Design Features
Compact and High-Reliability Structure
Standard K2-200 rack size, width only 22.5mm, saving control cabinet space; industrial-grade components, reinforced PCB, fully sealed dustproof enclosure (IP20), able to withstand vibration, dust, wide temperature range, MTBF ≥ 500,000 hours.
High Drive and High Safety
Single-channel 2A can directly drive most solenoid valves; permanent short-circuit protection + rapid shutdown, reducing fire and equipment damage risks, suitable for long-term continuous operation.
Easy Integration and Maintenance-Free
Bus automatic identification, no programming configuration required; LED intuitive diagnosis, fault quick location; Hot-swappable design, easy maintenance, only requires cleaning surface dust and maintaining ventilation in daily use.
Wide compatibility
Compatible with all models of KEBA K2-200 controllers, applicable to both new and old systems, with strong replaceability, suitable for equipment renovation and spare parts replacement.
VII. Typical Application Scenarios
Injection machinery: drive injection / melting electromagnetic valves, locking / unlocking valves, pinching valves, heating contactors, alarm indicator lights.
Die-casting / hydraulic equipment: control injection cylinders, booster cylinders, ejector valves, cooling valves, hydraulic pumps start-stop.
Machine tools and machining centers: drive cooling pumps, lubrication pumps, spindle start-stop, tool changing electromagnetic valves, travel indicator lights.
Automation assembly line: control conveyor belt start-stop, blocking cylinder, sorting electromagnetic valves, workstation indicator lights, buzzer.
General industrial control: 24V DC relays, contactors, small motors, indicator lights, alarmers and other switchable load drivers.
VI. Installation and Wiring
1. Installation Steps
When the power is off, align the module with the K2-200 backplane slot and push it in steadily until the latch locks, ensuring good contact of the K-bus bus.
Before powering on, check that it is firmly fixed and not loose; confirm that the 24V DC/5V DC power supply on the backplane is normal.
Support hot swapping: can be directly plugged and replaced during operation without stopping.
2. Wiring Specifications
Power: provided by the K-bus bus at 24V DC (output side) and 5V DC (system side), no external power supply required.
Output Wiring:
Each output terminal (O1–O14) connects to the positive pole of the load, and the negative pole of the load connects to 24V DC 0V (common terminal).
When the load is inductive (electromagnetic valves / relays), it is recommended to parallel a shunt diode (1N4007) to protect the module.
Wire diameter: 0.5–1.5mm² multi-strand copper wire, tighten the terminals to avoid loose connections; separate strong and weak current wiring to reduce interference.
3. Debugging and Fault Troubleshooting
Normal state: when the output is ON, the corresponding LED is always on; when OFF, it goes off.
No output: check the K-bus bus connection, backplane power supply, output terminal wiring, and whether the load is intact.
LED flashing (fault): corresponding channel short circuit / overload, immediately power off to troubleshoot the load and lines, and after eliminating the fault, restart.
Signal jitter / incorrect operation: check if the grounding is good, if the lines are subject to strong interference, and if inductive loads are equipped with a shunt diode.